<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script>
			var numb1=parseInt(prompt("请输入您的数字"));
			var ysf=prompt("+ - * /");
			var numb2=parseInt(prompt("请输入您的数字"));
			
			alert(numb1+numb2);
		</script>
	</head>
	<body>
	</body>
</html>
